Ice age

Shuipan Line

Jiuzun Line

Ice diameter (mm)

Density (g/cm3)

(Observation)

Ice accretion type

Ice diameter (mm)

Ice accretion type

1967

300

Smog type

200

Smog type

1968

300

Smog type

1969

280

Smog type

1970

380

0.34

Smog type

1971

380

Smog type

1974

240

0.5

Smog type

100

Rain type

1975

200

Smog type

1977

130

Smog type

1980

230

Smog type

1981

Smog type

180

Smog type

1984

400

Smog type

210

Smog type

1989

260